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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. lou salomon

    Herring Gull, North Shields, UK.

    the bird is within variation of argenteus. Bayonets are not the kind you want to see in (Newfoundland type) smithsonianus, all white p10 tip and long tongues can be shown by argenteus. Lack of p9 mirror makes it less likely it is a nominate argentatus. But due to huge variation, usually it is...